beri_mp.c

Version: - FREEBSD - FREEBSD-13-STABLE - FREEBSD-13-0 - FREEBSD-12-STABLE - FREEBSD-12-0 - FREEBSD-11-STABLE - FREEBSD-11-0 - FREEBSD-10-STABLE - FREEBSD-10-0 - FREEBSD-9-STABLE - FREEBSD-9-0 - FREEBSD-8-STABLE - FREEBSD-8-0 - FREEBSD-7-STABLE - FREEBSD-7-0 - FREEBSD-6-STABLE - FREEBSD-6-0 - FREEBSD-5-STABLE - FREEBSD-5-0 - FREEBSD-4-STABLE - FREEBSD-3-STABLE - FREEBSD22 - l41 - OPENBSD - linux-2.6 - MK84 - PLAN9 - xnu-8792
SearchContext: - none - 3 - 10
    1 /*-
    2  * Copyright (c) 2017 Ruslan Bukin <br@bsdpad.com>
    3  * Copyright (c) 2012-2015 Robert N. M. Watson
    4  * Copyright (c) 2013 SRI International
    5  * All rights reserved.
    6  *
    7  * This software was developed by SRI International and the University of
    8  * Cambridge Computer Laboratory under DARPA/AFRL contract (FA8750-10-C-0237)
    9  * ("CTSRD"), as part of the DARPA CRASH research programme.
   10  *
   11  * Redistribution and use in source and binary forms, with or without
   12  * modification, are permitted provided that the following conditions
   13  * are met:
   14  * 1. Redistributions of source code must retain the above copyright
   15  *    notice, this list of conditions and the following disclaimer.
   16  * 2. Redistributions in binary form must reproduce the above copyright
   17  *    notice, this list of conditions and the following disclaimer in the
   18  *    documentation and/or other materials provided with the distribution.
   19  *
   20  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   23  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   30  * SUCH DAMAGE.
   31  */
   32 
   33 #include <sys/cdefs.h>
   34 __FBSDID("$FreeBSD$");
   35 
   36 #include <sys/param.h>
   37 #include <sys/systm.h>
   38 #include <sys/smp.h>
   39 
   40 #include <machine/hwfunc.h>
   41 #include <machine/smp.h>
   42 
   43 #include <mips/beri/beri_mp.h>
   44 
   45 #include <dev/fdt/fdt_common.h>
   46 
   47 struct spin_entry {
   48         uint64_t entry_addr;
   49         uint64_t a0;
   50         uint32_t rsvd1;
   51         uint32_t pir;
   52         uint64_t rsvd2;
   53 };
   54 
   55 static phandle_t cpu_of_nodes[MAXCPU];
   56 static device_t picmap[MAXCPU];
   57 
   58 int
   59 platform_processor_id(void)
   60 {
   61         int cpu;
   62 
   63         cpu = beri_get_cpu();
   64 
   65         return (cpu);
   66 }
   67 
   68 void
   69 platform_cpu_mask(cpuset_t *mask)
   70 {
   71         int ncores, ncpus, nthreads;
   72         phandle_t cpus, cpu;
   73         pcell_t reg;
   74         char prop[16];
   75         struct spin_entry *se;
   76 
   77         ncores = beri_get_ncores();
   78         nthreads = beri_get_nthreads();
   79         KASSERT(ncores <= 0x10000, ("%s: too many cores %d", __func__, ncores));
   80         KASSERT(nthreads <= 0x10000, ("%s: too many threads %d", __func__,
   81             nthreads));
   82         KASSERT(ncores < 0xffff || nthreads < 0xffff,
   83             ("%s: cores x thread (%d x %d) would overflow", __func__, ncores,
   84             nthreads));
   85         ncpus = ncores * nthreads;
   86         if (MAXCPU > 1 && ncpus > MAXCPU)
   87                 printf("%s: Hardware supports more CPUs (%d) than kernel (%d)\n",
   88                     __func__, ncpus, MAXCPU);
   89         printf("%s: hardware has %d cores with %d threads each\n", __func__,
   90             ncores, nthreads);
   91 
   92         if ((cpus = OF_finddevice("/cpus")) <= 0) {
   93                 printf("%s: no \"/cpus\" device found in FDT\n", __func__);
   94                 goto error;
   95         }
   96         if ((cpu = OF_child(cpus)) <= 0) {
   97                 printf("%s: no children of \"/cpus\" found in FDT\n", __func__);
   98                 goto error;
   99         }
  100         CPU_ZERO(mask);
  101         do {
  102                 if (OF_getprop(cpu, "reg", &reg, sizeof(reg)) <= 0) {
  103                         printf("%s: cpu device with no reg property\n",
  104                             __func__);
  105                         goto error;
  106                 }
  107                 if (reg > MAXCPU) {
  108                         printf("%s: cpu ID too large (%d > %d)\n", __func__,
  109                             reg, MAXCPU);
  110                         continue;
  111                 }
  112                 cpu_of_nodes[reg] = cpu;
  113 
  114                 if (reg != 0) {
  115                         if (OF_getprop(cpu, "enable-method", &prop,
  116                             sizeof(prop)) <= 0 && OF_getprop(OF_parent(cpu),
  117                             "enable-method", &prop, sizeof(prop)) <= 0) {
  118                                 printf("%s: CPU %d has no enable-method "
  119                                     "property\n", __func__, reg);
  120                                 continue;
  121                         }
  122                         if (strcmp("spin-table", prop) != 0) {
  123                                 printf("%s: CPU %d enable-method is '%s' not "
  124                                     "'spin-table'\n", __func__, reg, prop);
  125                                 continue;
  126                         }
  127 
  128                         if (OF_getprop(cpu, "cpu-release-addr", &se,
  129                             sizeof(se)) <= 0) {
  130                                 printf("%s: CPU %d has missing or invalid "
  131                                     "cpu-release-addr\n", __func__, reg);
  132                                 continue;
  133                         }
  134                         if (se->entry_addr != 1) {
  135                                 printf("%s: CPU %d has uninitialized spin "
  136                                     "entry\n", __func__, reg);
  137                                 continue;
  138                         }
  139                 }
  140 
  141                 CPU_SET(reg, mask);
  142         } while ((cpu = OF_peer(cpu)) > 0);
  143         return;
  144 
  145 error:
  146         /*
  147          * If we run into any problems determining the CPU layout,
  148          * fall back to UP.
  149          *
  150          * XXX: panic instead?
  151          */
  152         CPU_ZERO(mask);
  153         CPU_SET(0, mask);
  154 }
  155 
  156 void
  157 platform_init_secondary(int cpuid)
  158 {
  159         device_t ic;
  160         int ipi;
  161 
  162         ipi = platform_ipi_hardintr_num();
  163 
  164         ic = devclass_get_device(devclass_find("beripic"), cpuid);
  165         picmap[cpuid] = ic;
  166         beripic_setup_ipi(ic, cpuid, ipi);
  167 
  168         /* Unmask the interrupt */
  169         if (cpuid != 0) {
  170                 mips_wr_status(mips_rd_status() | (((1 << ipi) << 8) << 2));
  171         }
  172 }
  173 
  174 void
  175 platform_ipi_send(int cpuid)
  176 {
  177 
  178         mips_sync();    /* Ordering, liveness. */
  179 
  180         beripic_send_ipi(picmap[cpuid], cpuid);
  181 }
  182 
  183 void
  184 platform_ipi_clear(void)
  185 {
  186         int cpuid;
  187 
  188         cpuid = platform_processor_id();
  189 
  190         beripic_clear_ipi(picmap[cpuid], cpuid);
  191 }
  192 
  193 /*
  194  * XXXBED: Set via FDT?
  195  */
  196 int
  197 platform_ipi_hardintr_num(void)
  198 {
  199 
  200         return (4);
  201 }
  202 
  203 int
  204 platform_ipi_softintr_num(void)
  205 {
  206 
  207         return (-1);
  208 }
  209 
  210 /*
  211  * XXXBED: Fine for MT, will need something better for multi-core.
  212  */
  213 struct cpu_group *
  214 platform_smp_topo(void)
  215 {
  216 
  217         return (smp_topo_none());
  218 }
  219 
  220 void
  221 platform_init_ap(int cpuid)
  222 {
  223         uint32_t status;
  224         u_int clock_int_mask;
  225 
  226         KASSERT(cpuid < MAXCPU, ("%s: invalid CPU id %d", __func__, cpuid));
  227 
  228         /* Make sure coprocessors are enabled. */
  229         status = mips_rd_status();
  230         status |= (MIPS_SR_COP_0_BIT | MIPS_SR_COP_1_BIT);
  231 #if defined(CPU_CHERI)
  232         status |= MIPS_SR_COP_2_BIT;
  233 #endif
  234         mips_wr_status(status);
  235 
  236 #if 0
  237         register_t hwrena;
  238         /* Enable HDWRD instruction in userspace. Also enables statcounters. */
  239         hwrena = mips_rd_hwrena();
  240         hwrena |= (MIPS_HWRENA_CC | MIPS_HWRENA_CCRES | MIPS_HWRENA_CPUNUM |
  241             MIPS_HWRENA_BERI_STATCOUNTERS_MASK);
  242         mips_wr_hwrena(hwrena);
  243 #endif
  244 
  245         /*
  246          * Enable per-thread timer.
  247          */
  248         clock_int_mask = hard_int_mask(5);
  249         set_intr_mask(clock_int_mask);
  250 }
  251 
  252 /*
  253  * BERI startup conforms to the spin-table start method defined in the
  254  * ePAPR 1.0 spec.  The initial spin waiting for an address is started
  255  * by the CPU firmware.
  256  */
  257 int
  258 platform_start_ap(int cpuid)
  259 {
  260         phandle_t cpu;
  261         char prop[16];
  262         struct spin_entry *se;
  263 
  264         KASSERT(cpuid != 0, ("%s: can't start CPU 0!\n", __func__));
  265         KASSERT((cpuid > 0 && cpuid < MAXCPU),
  266             ("%s: invalid CPU id %d", __func__, cpuid));
  267 
  268         cpu = cpu_of_nodes[cpuid];
  269         if (OF_getprop(cpu, "status", &prop, sizeof(prop)) <= 0) {
  270                 if (bootverbose)
  271                         printf("%s: CPU %d has no status property, "
  272                             "trying parent\n", __func__, cpuid);
  273                 if (OF_getprop(OF_parent(cpu), "status", &prop,
  274                     sizeof(prop)) <= 0)
  275                         panic("%s: CPU %d has no status property", __func__,
  276                             cpuid);
  277         }
  278         if (strcmp("disabled", prop) != 0)
  279                 panic("%s: CPU %d status is '%s' not 'disabled'",
  280                     __func__, cpuid, prop);
  281 
  282         if (OF_getprop(cpu, "enable-method", &prop, sizeof(prop)) <= 0) {
  283                 if (bootverbose)
  284                         printf("%s: CPU %d has no enable-method, "
  285                             "trying parent\n", __func__, cpuid);
  286                 if (OF_getprop(OF_parent(cpu), "enable-method", &prop,
  287                     sizeof(prop)) <= 0)
  288                         panic("%s: CPU %d has no enable-method property",
  289                             __func__, cpuid);
  290         }
  291         if (strcmp("spin-table", prop) != 0)
  292                 panic("%s: CPU %d enable-method is '%s' not "
  293                     "'spin-table'", __func__, cpuid, prop);
  294 
  295         if (OF_getprop(cpu, "cpu-release-addr", &se, sizeof(se)) <= 0)
  296                 panic("%s: CPU %d has missing or invalid cpu-release-addr",
  297                     __func__, cpuid);
  298         se->pir = cpuid;
  299         if (bootverbose)
  300                 printf("%s: writing %p to %p\n", __func__, mpentry,
  301                     &se->entry_addr);
  302 
  303         mips_sync();    /* Ordering. */
  304         se->entry_addr = (intptr_t)mpentry;
  305         mips_sync();    /* Liveness. */
  306 
  307         return (0);
  308 }
Cache object: 5cb3e3f03874f37ceaa42fda78ee0244
[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]
This page is part of the FreeBSD/Linux Linux Kernel Cross-Reference, and was automatically generated using a modified version of the LXR engine.
FreeBSD/Linux Kernel Cross Reference sys/mips/beri/beri_mp.c

FreeBSD/Linux Kernel Cross Reference
sys/mips/beri/beri_mp.c
